GPC14H Installation Manual

5
3. To ensure proper condensate drainage, unit must be
installed in a level position.
4. Consideration should also be given to shade, appearance
and noise.
36"
36"
24"
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FIGURE 2
DUCTING
WARNING
D O NOT , UNDER ANY CIRCUMSTANCES , CONNECT RETURN DUCT -
WORK TO ANY OTHER HEAT PRODUCING DEVICES SUCH AS FIRE -
PLACE INSERT , STOVE , ETC . U NAUTHORIZED USE OF SUCH DEVICES
MAY
RESULT IN PROPERTY DAMAGE , FIRE , CARBON MONOXIDE
POISONING
, EXPLOSION , PERSONAL INJURY OR DEATH .
Ducting work should be fabricated by the installing contractor
in accordance with local codes. Industry manuals may be
used as a guide when sizing and designing the duct system-
such as NESCA (National Environmental Systems
Contractors Association, 1501 Wilson Blvd., Arlington,
Virginia 22209).
The unit should be placed as close as possible to the space
to be air-conditioned allowing clearance dimensions as
indicated. Ducts should run as directly as possible to supply
and return outlets. Use of non-flammable weatherproof flexible
connectors on both supply and return connections at the
unit to reduce noise transmission is recommended.
It is preferable to install the unit on the roof of the structure if
the registers or diffusers are located in the wall or ceiling. A
slab installation is recommended when the registers are low
on the wall or in the floor.
Connecting the Return and Supply Flexible Duct in
Manufactured or Modular Housing Application
The return and supply fittings are to be attached at the unit
to a suitable square to round duct converter. Your distributor
has a factory designed square to round converter transition.
The model #’s of these kits are as follows: Small Chassis
25” SQRPCH101, Medium Chassis 27.5” SQRPCH102, Large
and Extra Large Chassis 32.5:” and 36” SQRPCH103 (See
Specification Sheets for Dimension details). The
SQRPCH101 has 14" duct collar on supply and 16" duct
collar (equivalent diameter, opening is oval) on the return.
The SQRPCH102 and SQRPCH103 have 14" duct collar on
supply and 18" duct collar (equivalent diameter, opening is
oval) on the return. The collars are to be slipped into the
openings, and the flanges bent around the converter. The
square to round converter is attached to the flanges of the
square duct openings. The flexible duct is then clamped
on to the collars. Once the duct is affixed to the unit, seal
the collars and flanges with a proper waterproof sealant
(See Figure 3).
It is strongly encouraged to use appropriately sized ducts
based upon the CFM for your application (unit’s CFM). If
duct sizing through industry manuals or air duct calculators
require larger ducts than converter openings, run larger duct
size up to unit converter openings and reduce with a reducer
duct fitting or transition right at the unit.
NOMINAL SIZE (INCHES) NOMINAL AREA (SQ. FT.)
10x20 1.4
14x20 1.9
14x25 2.4
15x20 2.1
16x20 2.2
16x25 2.8
20x20 2.8
20x25 3.5
25x25 4.3
MINIMUM FILTER SIZE
TABLE 1
OUTER FLANGE
STARTER FLANGE
SQUARE TO ROUND
DUCT CONVERTER PANEL
FIGURE 3
500 1000 1500 2000 2500 3000 3500
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Airflow - SCFM
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FIGURE 4
Plenum Application
A suitable plenum or square duct must be constructed. The
duct cross-sectional area should be determined by industry
duct sizing manuals or air duct calculators.